Back Кларк элемента Byelorussian Clarke-Wert German Klarko Esperanto Klark Estonian عدد کلارک Persian Clarke (grandeur) French Տարրերի կլարկներ Armenian クラーク数 Japanese კლარკის რიცხვი Georgian Кларк Kazakh
Clarke number or clarke is the relative abundance of a chemical element, typically in Earth's crust. The technical definition of "Earth's crust" varies among authors, and the actual numbers also vary significantly.
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